Manufacture of tubular structures.



Patented lan. 22, I90I; J. T. WILSON. MANUFAGTURE OFTUBULAR STRUCTURES.

2 sheets sheet l.

(No Model.)

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UNITED STATES PATENT OEFIeE.:

JonN T. WIESO-tuer Pi'r'rsURe,PENNsYLyANIAl-.

MANunto-roma oF, TusULAR sTRuc-ru RES.'

sPEcIEIcATioN forming pm of renters sacem; No. eee,45o. dated January 22, .1901.,

Applicstion'led November 1, 1900. Serial No..35,180. (No specimens-l To all whom it'may concern,.-

e it known that I', J oHN T. WILSON, a citizen of the United States,1'esiding at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in the Manufacturefof Tubular Structures; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains tomake and use the same.

My invent-ion relates to the art 0f forging metals for making tubular structures-such as ordnance, shafting, and the likehas for."

its object the securing of great tensile and torsional strength, and consists inA certain improvements which will be fully disclosed in the following specification and claims.

' In the'faccompanying drawings, which form part'.of this specification,l Figure l represents a longitudinal section of a tubular structure showing the manner of assembling 'the compo^nent parts; Fig. 2, a transverse section on line A A, Fig. l; Fig. 3, a longitudinal secu tion. of the structureafrer it has been forged -and welded intoa homogeneous body; Fig.

4, a transverse section on line B B, Fig. 3; and Fig. 5 a vertical transverse section of the die,`ona reduced scale, in which the struc- Reference being hadvto Athe drawings and the designating characters thereon, 1 indicates the base or core of thestructure, and consists of a tube, which may be a drawn seamless tube, a welded tube, or atube with the edges or searn not welded,and 2 a tube surrounding the base or core', and is preferably made with an open seam 3,extending throughout the length of the tube.

The opening between the edges of the metal is of the shape of the letter V inverted, las shown in Fig. 2.

lThese two tubes may be assembled by telescoping the`onev upon the other by any suitable means and the two constitute the base or core, or thetube 2 may be omitted for some purposes.` Y

l1indicatesacourse of triangular bar metal,- steel or iron, as preferred, about one and onehalf or twolnches thick and whose'sides are at `anangle. of forty-five degrees to the base, wound spit-ally upon the baseer coreof the structure, with the base of the triangle toward the transverse center ofthe core,and upon-this course is wound a course 5 of the same kind of metal, with the apex lof the triangle -to The body thus formed orl with the omission of the tube'2 is then heated ward the core.

and subjected to aforging process, by which the fiber of the metal is'forced toward the transverse 'center of the body and the parts 4.but in the opposite' direction, to cross the ber of the metal, and the whole is 'then heated and subjected toa like forging process,l and these concentric courses welded together and to the body as previously formed.

As thus constructed the tubular structure is adapted for use asshafting and other pur'- poses, in which great tensile and torsional strength is required,l especially in' propeller shafting and shafting used for driving heavy machinery,

The i ubular body is supported and revolved by any suitable means, and the triangular bar metal as it proceeds from the rolls is wound spi rally in the usual-manner of coiling or winding metal strips orjbars. j g

The spirally-wound sections of bar metal serve to reinforce thetubular core, and they may be multiplied as' required in the construction of ordnance or other articles toany desired extent for forming the breech end of a gun, as shown, or thickening or reinforcing any particular part of a tubular/structure'. The courses, it will be observed, are in pairs or double, one fitting into the other, and the alternate double'course -in each instance 'is wound spirally in a direction opposite to the preceding double course. k'

The structure is forged upon a suitable expansible mandrel 8, which secures the welding of t-he seam in the core or base 1, should it be open, as described, andthe closing and i welding of the seam 3 in tube' 2 when it is fused, and this working of the metal' in the core by the external pressure or force of a hammer, with a section of a suitable dieatf IOO - tached thereto, greatly solidiles the core pf the structure, which in its use for. ordnance becomes the bore of the gun. The forging is done ina die 9, (see Fig. 5,) havingconverging Walls 10, in which thestructure is manipulated longitudinally and rotated while it is being forged and welded, thus forcing the metal from the periphery toward the transverse center of the structure, as indicated by arrows, firmly welding the several courses together and forming a homogeneous body of'- tbe whole, in which part of the fiber of the metal ext-ends longitudinally throughout the 'length of the structure, and part of the fiber extends diagonally around the structure in one direction and another part of the fiber of the metal extends in likeman ner'in the opposite direction, thus'insu ring great tensile and torsional strength.

Having thus fully described my invention, what I claim is l. The method of making metallic structures, which consists in' forming. a base or core,

buildinga body thereon by Winding double courses of triangular bar metal iu opposite directions on said' base, heat-ing, forging and welding the component parts together by force applied to the surface and converging toward the. transverse center of the structure. y

' 2. The method of making tubular structures, which consists in forming a vtubular base or core, building a body thereon'by winding triangular-shaped bar metal i-n opposite directions vind in double concentric courses on said base, heating, forging and Welding the componenty parts together byforce applied to` i Iiberof the metal, heating, forging and welding the composite parts into a homogeneous body.

.4. `The method of making tubular struc` tures, which consists in forming a tubular base or core, surrounding said base by a concentric tubular body having an open seam the length of the body, the-.n winding courses of triangular bar metal thereon, then heating,

forging, and welding the composite body and closing and welding said seam, then winding additional courses ol triangular' bar metal thereon in the opposite directonand crossing the fiber, then heating, forging and welding said courses and forming a homogeneous body.

5. The method of making tubular' structures, which consists in yforming a tubular" base or core, ysuiroundiug said base by'a concentric tubular body having an open seam the length of the body, then winding double courses of triangular bar metal thereon with the base of the triangle of the inner course toward the tubular base, then heating, forging and welding the composite body and closing and welding said seam, then winding 'courses of heavier triangular bar metal in like manner, but in the opposite direction,

upon the structure, then heating, forging andwelding said courses together and to th'e prcviouslyfformed body. v

6. A metallic structure composed of a base or core, and a plurality of 4double courses of' triangular bar'metal wound upon the core inv opposite directions, and the whole Welded into a homogeneous body;

7. Atubularstructurecomposed of `a tubu-y lar base or core, and a plurality of double courses of triangular bar metal wound upon the core in opposite directions and the whole 4 Welded into a homogeneous body.

8. A tubular vstructure composed of a tubular base orcore, and a plurality of concentric courses of triangular bar metal of different thicknesses wound upon the base or core in opposite directions, and the 'whole welded into a homogeneous body.

9. A tubular structure composed of a plurality of concentric tubes, anda plurality of concentric double courses of triangular bar metal of dilerent. thicknesses wound spirally upon said concentric tubes in opposite directions, and the whole welded into a homogeneous body.

In testimony whereof I affix my signature in presence of two Witnesses.

' JOHN Ti WILSON.l

Witnesses: Y,

D. C. Rameau, W. PARKER REINOHL. 

